*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0b0b10;
  --surface: #14141e;
  --border: #252535;
  --accent: #fb923c;
  --accent-hover: #ea7116;
  --text: #e8e8f0;
  --muted: #7878a0;
  --radius: 14px;
}

html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 16px; line-height: 1.65; }
a { color: inherit; text-decoration: none; }

.navbar { position: sticky; top: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 0 40px; height: 60px; background: rgba(11,11,16,0.88); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-logo { font-size: 1.15rem; font-weight: 800; color: var(--text); }
.nav-logo span { color: var(--accent); }

.hero { padding: 100px 20px 80px; text-align: center; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -200px; left: 50%; transform: translateX(-50%); width: 800px; height: 600px; background: radial-gradient(ellipse, rgba(251,146,60,0.12) 0%, transparent 70%); pointer-events: none; }
.hero-inner { position: relative; max-width: 760px; margin: 0 auto; }
.hero-badge { display: inline-block; background: rgba(251,146,60,0.12); border: 1px solid rgba(251,146,60,0.3); color: #fdba74; font-size: 0.8rem; font-weight: 600; padding: 4px 14px; border-radius: 20px; margin-bottom: 24px; letter-spacing: 0.04em; text-transform: uppercase; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 20px; }
.gradient-text { background: linear-gradient(135deg, #fb923c, #fdba74); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 1.1rem; color: var(--muted); max-width: 580px; margin: 0 auto 32px; }
.hero-sub strong { color: var(--text); }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: 10px; margin-bottom: 48px; }
.hero-note { font-size: 0.8rem; color: var(--muted); }
.hero-stats { display: flex; align-items: center; justify-content: center; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 32px; flex-wrap: wrap; gap: 8px; }
.hstat { display: flex; flex-direction: column; align-items: center; padding: 0 24px; }
.hstat strong { font-size: 1.5rem; font-weight: 800; background: linear-gradient(135deg, #fb923c, #fdba74); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hstat span { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }
.hstat-div { width: 1px; height: 36px; background: var(--border); }

.section-inner { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.section-inner--narrow { max-width: 720px; }
.section-title { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 800; text-align: center; margin-bottom: 48px; letter-spacing: -0.02em; }

.tool-section { padding: 80px 20px; border-top: 1px solid var(--border); background: var(--surface); }
.card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-top: 20px; }

.drop-zone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 64px 24px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--accent); background: rgba(251,146,60,0.04); }
.drop-icon { font-size: 3.5rem; margin-bottom: 16px; }
.drop-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.drop-sub { font-size: 0.88rem; color: var(--muted); }

/* Settings bar */
.settings-bar { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 24px; }
.bar-group { display: flex; flex-direction: column; gap: 8px; }
.bar-label { font-size: 0.78rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.option-group { display: flex; gap: 6px; flex-wrap: wrap; }
.opt-btn { padding: 7px 14px; border-radius: 7px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: all 0.15s; white-space: nowrap; }
.opt-btn:hover { border-color: var(--accent); color: var(--text); }
.opt-btn.active { background: rgba(251,146,60,0.15); border-color: rgba(251,146,60,0.5); color: #fdba74; }
.bar-actions { display: flex; gap: 10px; align-items: center; margin-left: auto; flex-wrap: wrap; }
.pdf-meta { font-size: 0.88rem; color: var(--muted); margin-top: 12px; }

/* Progress */
.progress-wrap { }
.progress-status { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; font-size: 0.9rem; font-weight: 600; }
#progressPct { color: var(--accent); }
.progress-bar-bg { height: 8px; background: var(--surface); border-radius: 99px; overflow: hidden; border: 1px solid var(--border); }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, #fb923c, #fdba74); border-radius: 99px; transition: width 0.3s ease; width: 0%; }

/* Pages */
.pages-toolbar { display: flex; align-items: center; justify-content: space-between; margin: 20px 0 12px; flex-wrap: wrap; gap: 10px; }
.pages-info { font-size: 0.88rem; color: var(--muted); }
.pages-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.page-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: border-color 0.15s; }
.page-card:hover { border-color: rgba(251,146,60,0.4); }
.page-thumb { width: 100%; display: block; background: #fff; }
.page-footer { padding: 10px 12px; display: flex; align-items: center; justify-content: space-between; }
.page-label { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.dl-btn { font-size: 0.78rem; padding: 4px 12px; }

/* How / Steps */
.how-section { padding: 80px 20px; border-top: 1px solid var(--border); }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 24px; text-align: center; }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: rgba(251,146,60,0.12); border: 1px solid rgba(251,146,60,0.3); color: var(--accent); font-size: 1.2rem; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.step h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.step p { font-size: 0.88rem; color: var(--muted); line-height: 1.65; }

/* FAQ */
.faq-section { padding: 80px 20px; border-top: 1px solid var(--border); }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.faq-item summary { padding: 18px 20px; font-weight: 600; font-size: 0.95rem; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; user-select: none; }
.faq-item summary::after { content: '+'; font-size: 1.2rem; color: var(--accent); transition: transform 0.2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 20px 18px; font-size: 0.9rem; color: var(--muted); line-height: 1.7; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 9px; font-size: 0.9rem; font-weight: 600; cursor: pointer; border: none; transition: background 0.15s, transform 0.1s; white-space: nowrap; text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-lg { padding: 14px 32px; font-size: 1rem; border-radius: 10px; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

.toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px); background: #1e1e2e; border: 1px solid var(--border); color: var(--text); font-size: 0.88rem; font-weight: 500; padding: 10px 20px; border-radius: 30px; opacity: 0; transition: opacity 0.2s, transform 0.2s; pointer-events: none; z-index: 999; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.site-footer { border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { max-width: 1000px; margin: 0 auto; padding: 60px 20px 40px; display: flex; gap: 60px; flex-wrap: wrap; }
.footer-brand { flex: 2; min-width: 220px; }
.footer-brand p { color: var(--muted); font-size: 0.88rem; margin-top: 10px; line-height: 1.7; }
.footer-home-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-size: 0.85rem; font-weight: 600; color: var(--accent); border: 1px solid var(--border); padding: 7px 14px; border-radius: 8px; transition: background 0.15s, color 0.15s; }
.footer-home-link:hover { background: var(--surface); border-color: var(--accent); color: var(--text); }
.footer-links { flex: 1; min-width: 120px; }
.footer-links h3 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 14px; }
.footer-links ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 0.88rem; color: var(--muted); transition: color 0.15s; }
.footer-links a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); text-align: center; padding: 20px; font-size: 0.8rem; color: var(--muted); } .footer-bottom a { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; transition: color 0.15s; } .footer-bottom a:hover { color: var(--text); }

@media (max-width: 700px) {
  .navbar { padding: 0 20px; }
  .hero { padding: 70px 16px 60px; }
  .hstat-div { display: none; }
  .settings-bar { flex-direction: column; align-items: flex-start; }
  .bar-actions { margin-left: 0; }
  .footer-inner { gap: 32px; }
}